A Journey into the Contents of a Blue Vegetable Basket
Introduction
This is a personal project of mine that I started a year ago out of curiosity and the necessity of wanting something to practice my data manipulation and analysis skills in R, the use of Markdown, and eventually also R Shiny in.
The focus of Birsmattehof farm in Therwil is the production of organic vegetables. These can be bought directly from their farm, their farm stands at various weekly markets around Basel, or they can ordered for delivery on a weekly basis. I am a customer of the third option: 46 times a year we recieve a basket full of freshly harvested organic vegetables, the contence of which is a surprise, as the variety and amount is determined by the season and the local weather conditions. On average, our basket order contains 3.5 - 5 kilograms per week.
Over the course of many months, I weighed and noted all vegetables that we recieved in the basket. I then correlated these data the with local meterological data in hopes of finding some interesting trends.
More information to the farm and their products can found on their website https://www.birsmattehof.ch/.
Birsmattehof, Therwil
Installing and Loading the Necessary R Packages
For the transformation, analysis, and visualisation of the data several packages were used:
tidyverse, version 1.3.1
Citation: Wickham et al., (2019). Welcome to the tidyverse. Journal of Open Source Software, 4(43), 1686, https://doi.org/10.21105/joss.01686dyplr, version 1.0.5
Citation: Hadley Wickham, Romain Francois, Lionel Henry and Kirill Mueller (2021). dplyr: A Grammar of Data Manipulation. R package version 1.0.5. https://CRAN.R-project.org/package=dplyr stringr, version 1.4.0
Citation: Hadley Wickham (2019). stringr: Simple, Consistent Wrappers for Common String Operations. R package version 1.4.0. https://CRAN.R-project.org/package=stringrlubridate, version 1.7.10
Citation: Garrett Grolemund, Hadley Wickham (2011). Dates and Times Made Easy with lubridate. Journal of Statistical Software, 40(3), 1-25. URL https://www.jstatsoft.org/v40/i03/.plotly, version 4.10.0
Citation: C. Sievert. Interactive Web-Based Data Visualization with R, plotly, and shiny. Chapman and Hall/CRC Florida, 2020. URL https://plotly-r.com. ### Installing Packages:
# install.packages("tidyverse")
# install.packages("dplyr")
# install.packages("stringr")
# install.packages("lubridate")
# install.packages("plotly")
### Loading Packages
library(dplyr)
library(stringr)
library(tidyverse)
library(lubridate)
library(plotly)
### Obtaining Citations
# citation(package="dplyr", lib.loc = NULL, auto = NULL)
# citation(package="tidyverse", lib.loc = NULL, auto = NULL)
# citation(package="stringr", lib.loc = NULL, auto = NULL)
# citation(package="lubridate", lib.loc = NULL, auto = NULL)
# citation(package="plotly", lib.loc = NULL, auto = NULL)Importing Data
Two raw data files were imported for this project.
The first data set, "BMH_Veggiedata_V1.csv"" is a csv file containing all vegetable weights collected spanning from the 10th of November 2020 to the 21th of Decemeber 2021. This file contains a column for the vegetable category (i.e. cabbage), a second column for the specific vegetable (i.e. red cabbage), and then columns for the weights of all produce for each date when a basket was collected.
The second file "weather.csv" is a csv file containing meterological data from Basel during the same time period. This data was downloaded from Meteoblue (meteoblue AG, Greifengasse 38, CH-4058, Basel, Switzerland) at https://www.meteoblue.com/en/weather/archive/export/basel_switzerland_2661604 on the 23.12.2021. This file contains a column for the date, a second for every hour of the day, and a column for measurements of temperature, sunshine, precipiation, snowfall, humidity, and cloud cover.
These data sets will be referred to as the "Vegetable Data Set" and the "Weather Data Set", respectively, from here on out.
# Setting working directory and listing files
setwd("C:/Users/gartens1/Desktop/BMH")
list.files()
# Vegetable Data
filepath <- "C:/Users/gartens1/Desktop/BMH/BMH_Veggidata_V1.csv"
rawdata <- read.csv(filepath, header = TRUE, sep = ";")
# Weather Data
filepath2 <- "C:/Users/gartens1/Desktop/BMH/weather.csv"
rawdata2 <- read.csv(filepath2, header = TRUE, sep = ",")Tidy Data
Tidy data dictates that each variable has its own column and each observation has its own row. This format provides a standard way for structuring a dataset which allows for easier analysis. As neither of the two datasets are tidy, the first step of this analysis will deal with wrangling the data into this format. The following sections describe each step of the transformation for both data sets.
Vegetable Data
With the head() function a sneak peak at the original dataset can be taken to see its stucture. All unneeded columns and rows are removed. The last row contains the summed weight of all vegetables in each basket. The three last columns contain calculations done in the original excel file. These rows and columns are not needed as these calculations will be performed off of the tidy data set using R code. To remove them in a way so that the code will also work should additional rows (i.e. new vegetable types) and columns (i.e. more measurement dates) be added to the original dataset, the variables nrand nc were created where the former is the number of rows minus 1 and the latter is the number of columns minus 3. The original rawdata dataset was then transformed accordingly and stored as data1.
The 3.5 - 5 kilograms of vegetables that we recieve weekly throughout the year are split into 46 baskets. The vegetables are delievered weekly except for during the months of January and February, where the basket contains the doubled amount of produce but is only delivered every two weeks. Also, no basket is delievered the week between Christmas and New Years. To account for this, the recorded data from the dates of the 12.01.2021, 26.01.2021, 09.02.2021, 23.02.2021, and the 09.03.2021 is halved and copied into the weeks of the 05.01.2021, 19.01.2021, 02.02.2021, 16.02.2021, and the 02.03.2021, respectively.
# Taking a look at the original dataset
head(rawdata)
# Removing unncessary columns/rows
nr <- nrow(rawdata) - 1
nc <- ncol(rawdata) - 3
data1 <- rawdata[c(1:nr),c(1:nc)]
# Splitting doublely-sized baskets into two weeks
data1$X05.01.2021 <- (data1$X12.01.2021)/2
data1$X12.01.2021 <- (data1$X12.01.2021)/2
data1$X19.01.2021 <- (data1$X26.01.2021)/2
data1$X26.01.2021 <- (data1$X26.01.2021)/2
data1$X02.02.2021 <- (data1$X09.02.2021)/2
data1$X09.02.2021 <- (data1$X09.02.2021)/2
data1$X16.02.2021 <- (data1$X23.02.2021)/2
data1$X23.02.2021 <- (data1$X23.02.2021)/2
data1$X02.03.2021 <- (data1$X09.03.2021)/2
data1$X09.03.2021 <- (data1$X09.03.2021)/2To tidy the vegetable dataset, I first generated a dataframe cnames with all except the first two column names using colnames(). The dates in the columns contain the letter "X" in the name (e.g. "X02.02.2021"). Using str_remove() this part of the string was removed. The format of the vector was then changed to "Date" using the as.Date() function. With as.data.frame() this repeating list was transformed into a dataframe.
Similarly, two dataframes vegcat and veg containing a repetition of the vegetable categories and vegetables (columns 1 and 2, respectively) "nc-2" times was generated (the first two columns from "nc" were subtracted to account for the columns with the vegetable names and their categories).
The dataframe weight containing all weight measurements was generated by unlisting all columns (except 1 and 2) of data1.
These four dataframes were combined together using cbind() to generate the dataframe veggiedata. Finally, using na.omit(), all NA values were removed. The four columns of the tidy dataframe veggiedata were renamed appropriately with the command colnames().
# generating date vector and removing "X"
cnames <- colnames(data1[-c(1,2)])
cnames <- str_remove(cnames, "[X]")
cnames <- as.Date(cnames, format = "%d.%m.%Y")
# generating dataframe of dates repeated "nr"" times
date <- as.data.frame(rep(cnames, each = nr))
# generating dataframes of all vegetables and vegetable categories "nc" minus 2 times.
vegcat <- as.data.frame(rep(data1$Vegetable.Category[1:nr], times = nc-2))
veg <- as.data.frame(rep(data1$Vegetable[1:nr], times = nc-2))
# generating a dataframe of all weights
weight <- as.data.frame(unlist(data1[,-c(1,2)]))
# cbind and remove all NAs
veggiedata <- na.omit(cbind(date, vegcat, veg, weight))
# rename columns
colnames(veggiedata) <- c("Date", "Vegetable_Category", "Vegetable", "Weight")The veggiedata dataframe contains four columns: Date, Vegetable_Category, Vegetable, and Weight. Two calculations were performed on these columns. Firstly, the total weight of each vegetable basket was calculated by summing all of the individual weights. Secondly, the percentage that each vegetable weighs in each basket was calculated (i.e. on the 2020-11-10, Red Cabbage accounted for 16.8% of the total basket weight). Both of these calculations were performed using the summarise() function. These two newly calculated columns were added to the original dataframe as Basket_Weight and Percent, respectively, forming a new dataframe veggiedata2.
The total weight of all baskets as well as the average weight of each basket was calculated and stored as the variables weightsum and weightaverage, respectively. Additionally, the total weight of each vegetable category and each vegetable was calculated and stored in the dataframes categoryweights and vegetableweights.
# Calculating the total basket weight by measurement date and the percentage of each vegetable weight in each basket
basketweight <- veggiedata %>%
group_by(Date) %>%
summarise(Weight = sum(Weight))
veggieweight<- merge(veggiedata, basketweight, by = "Date", all = TRUE)
colnames(veggieweight) <- c("Date", "Vegetable_Category", "Vegetable", "Weight", "Basket_Weight")
veggiedata2 <- veggieweight %>%
summarise(Date = Date,
Vegetable_Category = Vegetable_Category,
Vegetable = Vegetable,
Weight = Weight,
Basket_Weight = Basket_Weight,
Percent = (veggieweight$Weight / veggieweight$Basket_Weight)*100) %>%
mutate_if(is.numeric, ~round(., 1))
# Calculating total weight of all baskets and average basket weight
weightsum <- sum(basketweight$Weight)
weightaverage <- round(mean(basketweight$Weight), digits = 1)
# Calculating total weight of each vegetable category and each vegetable
categoryweights <- veggiedata %>%
group_by(Vegetable_Category) %>%
summarise(Weight = sum(Weight)) %>%
arrange(desc(Weight))
vegetableweights <- veggiedata %>%
group_by(Vegetable) %>%
summarise(Weight = sum(Weight)) %>%
arrange(desc(Weight))For neatness, the environment was cleared of all unneeded objects except for the final tidy veggiedata2, categoryweights and basketweight dataframes as well as the two variables weightaverageand weightsum.
# remove all unneeded objects from environment
rm(veggiedata, veggieweight, data1, date, rawdata, veg, vegcat, weight, cnames, filepath, nc, nr)Weather Data
With the head() function a sneak peak at the original dataset can be taken to see its stucture. The parameter was set to 15 to be able to properly see the format. The first 9 rows of the dataset will not be needed and were deleted to generate data2. The first step was to transform the date-time column into a properly formatted date. This was done using str_split_fixed() to split the original column into two columns, date and time, respectively, separated by the letter "T". The date column was transformed into date format using ymd() (the time column was not needed for this analysis). This date column was bound to the data using cbind() to generate the dataframe weather. The original, messy date-time column was removed. The class of the columns containing the weather data were changed to numeric using transform(). Finally, all columns were renamed appropriately using colnames().
# Taking a look at the original dataset
head(rawdata2, 15)
# Remove unncessary rows at the top
data2 <- rawdata2[-c(1:9),]
# fix date/time issue: split string and generate column only with date
date2 <- as.data.frame(str_split_fixed(data2[,1], "T", 2))
date2 <- ymd(date2[,1])
# bind date column to the dataframe and remove all unneeded columns
weather <- cbind(date2, data2)
weather <- weather[,-c(2)]
weather <- transform(weather,
Basel = as.numeric(Basel),
Basel.1 = as.numeric(Basel.1),
Basel.2 = as.numeric(Basel.2),
Basel.3 = as.numeric(Basel.3),
Basel.4 = as.numeric(Basel.4),
Basel.5 = as.numeric(Basel.5))
# rename columns appropriately and change class from character to numeric
colnames(weather) <- c("Date", "Temperature_C", "Sunshine_min", "Precipitation_mm", "Snowfall_cm", "Humidity_per", "Cloudcover_per")Although the weather dataframe now appears neat, it is not yet in the tidy format. In the next steps individual dataframes for each weather condition were generated with just one value per day (i.e. the average daily temperature, the daily sum of precipitation, etc). For the measurements of temperature, humidity, and cloudcover the daily average values were calculated by grouping data by Date in the weather dataset and calculating the mean value. Similarily, for the measurements of sunshine, snow, and precipitation the daily totals were calculated by grouping data by Date in the weather dataset and calculating the sum of each. In order to generate the final weather2 dataframe an additional column with the name of the measurement (i.e. "Temperature_C", "Sunshine_min") was made and placed in between the date and the measurement value columns. Using nrow() the number of rows (i.e. the number of measurement days) was calculated and stored as days. This variable was then used to generate the correct length for the column containing the "Condition". For each weather condition the three columns were renamed to "Date", "Condition", and "Measurement". The six individual dataframes were then all joined together using rbind() to generate the final compact tidy dataframe weather2.
# Temperature: daily average temperture (average)
temperature <- weather %>%
group_by(Date) %>%
summarise(Temperature_C = mean(Temperature_C)) %>%
ungroup()
days <- nrow(temperature)
temp1 <- as.data.frame(rep("Temperature_DailyAverage", times = days))
temperature <- cbind(temperature$Date, temp1, temperature$Temperature_C)
colnames(temperature) <- c("Date", "Condition", "Measurement")
# Sunshine: daily sunshine minutues (sum)
sunshine <- weather %>%
group_by(Date) %>%
summarise(Sunshine_min = sum(Sunshine_min)) %>%
ungroup()
sun1 <- as.data.frame(rep("Sunshine_DailyAverage", times = days))
sunshine <- cbind(sunshine$Date, sun1, sunshine$Sunshine_min)
colnames(sunshine) <- c("Date", "Condition", "Measurement")
# Precipitation: daily preciptation (sum)
precipitation <- weather %>%
group_by(Date) %>%
summarise(Precipitation_mm = sum(Precipitation_mm)) %>%
ungroup()
precip1 <- as.data.frame(rep("Precipitation_DailySum", times = days))
precipitation <- cbind(precipitation$Date, precip1, precipitation$Precipitation_mm)
colnames(precipitation) <- c("Date", "Condition", "Measurement")
# Snowfall: daily snowfall (sum)
snowfall <- weather %>%
group_by(Date) %>%
summarise(Snowfall_cm = sum(Snowfall_cm)) %>%
ungroup()
snow1 <- as.data.frame(rep("Snowfall_DailySum", times = days))
snowfall <- cbind(snowfall$Date, snow1, snowfall$Snowfall_cm)
colnames(snowfall) <- c("Date", "Condition", "Measurement")
# Humidity: daily average humidity (average)
humidity <- weather %>%
group_by(Date) %>%
summarise(Humidity_per = mean(Humidity_per)) %>%
ungroup()
hum1 <- as.data.frame(rep("Humidity_DailyAverage", times = days))
humidity <- cbind(humidity$Date, hum1, humidity$Humidity_per)
colnames(humidity) <- c("Date", "Condition", "Measurement")
# Cloud Cover: daily average cloud cover (average)
cloudcover <- weather %>%
group_by(Date) %>%
summarise(Cloudcover_per = mean(Cloudcover_per)) %>%
ungroup()
cloud1 <- as.data.frame(rep("Cloudcover_DailyAverage", times = days))
cloudcover <- cbind(cloudcover$Date, cloud1, cloudcover$Cloudcover_per)
colnames(cloudcover) <- c("Date", "Condition", "Measurement")
# make one dataframe
weather2 <- rbind(cloudcover, precipitation, humidity, temperature, snowfall, sunshine)
weather2$Measurement <- round(weather2$Measurement, digits = 1)For neatness, the environment was cleared of all unneeded objects except for the final tidy weather2 dataframe.
# remove all unneeded objects from environment
rm(weather, cloud1, cloudcover, hum1, humidity, precip1, precipitation, snow1, snowfall, sun1, sunshine, temp1, temperature, data2, rawdata2, days, filepath2, date2)Data Exploration
In this section, I explored the veggiedata2 dataset to see if I could find interesting correlations to the weather2 dataset. For this exploratory data analysis I used ggplot() and plotly() to graphically display the data, as well as a number of functions from the tidyverse package.
Distribution of different Vegetable Types throughout the Year
To visualise the distribution of different vegetable categories in each basket throughout the entire measurment period, the plot allveg1 was generated with ggplot(). A horizontal line marking the average basket weight was added to the plot using geom_hline() with the value of weightaverage as its y-intercept. Similarly, the plot allveg2 was created using plotly(). The horizontal line indicating the average basket weight was drawn using the function defined as hline. In my opinion, one of the clear advantages of the allveg2 plot is the interactive nature of the graph itself, even though I find the syntax of ggplot() easier to navigate. As evidented by the allveg2 code and the final plot, there is room for improvement.
The heaviest basket was on the 11.05.2021 with 6.742kg, and the lightest on the 02.03.2021 and 09.03.2021 with 2.286kg each. The average basket weight was 4.801kg, which surpasses the expected average weight of 4.25kg (the expected weight range is between 3.5kg and 5kg).
# Plotting (ggplot):
allveg1 <- ggplot(data=veggiedata2,
aes(x=Date, y=Weight)) +
geom_bar(stat = "identity",
aes(fill = Vegetable_Category), color = "black") +
xlab("Date") +
ylab("Weight (gr)") +
ggtitle("Distribution of Vegetable Types throughout the Year") +
theme(legend.key.size = unit(0.25, 'cm'),
axis.text.x = element_text(angle = 45, vjust = 1, hjust = 1),
axis.title.x = element_text(vjust = 0)) +
scale_x_date(date_breaks = "1 month",
date_labels = "%m/%y") +
scale_y_continuous(name = "Weight (gr)", breaks = seq(0, 7000, 1000)) +
geom_hline(yintercept = weightaverage,
col = "black",
lwd = 0.5,
linetype = "dotted") +
annotate("text",
x = as.Date("2021-02-01"),
y = c(5430, 5230, 5030),
label = c("Mean Basket","Weight:", paste0(weightaverage, "gr")),
size = 2.5)
allveg1
# Plotting (plotly):
hline <- function(y = 0, color = "blue") {
list(
type = "line",
x0 = 0,
x1 = 1,
xref = "paper",
y0 = y,
y1 = y,
line = list(color = color,
size = 0.5)
)
} # function taken from https://stackoverflow.com/questions/34093169/horizontal-vertical-line-in-plotly
# define custom colours
custom_col <- c("darkmagenta", "lemonchiffon", "aliceblue", "aquamarine", "beige","navy", "blue",
"cadetblue", "blueviolet", "cyan", "#F08080", "deeppink", "#FF00FF", "gold", "darkcyan",
"yellow", "mediumvioletred")
custom_col <- setNames(custom_col, c("Tomato", "Potato", "Herbs", "Celery", "Aubergine", "Squash", "Fennel", "Capsicum", "Salad", "Onions", "Cucumber", "Cabbage", "Root Vegetable", "Leafy Greens", "Corn", "Beans", "Other"))
allveg2 <- plot_ly(data = veggiedata2,
x = ~Date,
y = ~Weight,
color = ~Vegetable_Category,
text = ~Vegetable,
colors = custom_col,
textposition = 'none',
type = "bar",
marker = list(line = list(color = 'rgb(8,48,107)',
width = 0.5)),
hovertemplate = paste('<b>Vegetable</b>: %{text}' ,
'<br><b>Weight</b>: %{y}gr',
'<br><b>Date</b>: %{x}',
'<extra></extra>'),
hoverinfo = 'text' ) %>%
layout(barmode = 'stack',
title = "Distribution of Vegetable Types throughout the Year",
plot_bgcolor='#e5ecf6',
xaxis = list(
title = "",
type = 'date'),
yaxis = list(title = "Weight (grams)"),
legend = list(orientation = 'h', size = 3),
font = list(family = "Arial")) %>%
add_trace(y=weightaverage,
type = "scatter",
mode="lines+markers",
showlegend = FALSE)
# add_text(showlegend = FALSE,
# x = "2021-02-01",
# y = 5200,
# text = paste('Average Basket Weight: <br>', weightaverage, 'grams'),
# textfont = list(color = "blue",
# size = 7,
# family = "Arial")) %>%
allveg2allveg3<-add_trace(allveg2,
y=weightaverage, type = "scatter", mode="lines+markers", showlegend = FALSE)
allveg3# finding the heaviest and lightest baskets
heaviest <- basketweight[which.max(basketweight$Weight),]
print(heaviest)## # A tibble: 1 x 2
## Date Weight
## <date> <dbl>
## 1 2021-05-11 6742lightest <- basketweight[which.min(basketweight$Weight),]
print(lightest)## # A tibble: 1 x 2
## Date Weight
## <date> <dbl>
## 1 2021-03-02 2286.Correlation of Vegetable Categories and Daily Average Temperature
To take a closer look at the vegetable distribution in the basket throughout the year, subsets of veggiedata2 were plotted and correlated with the daily average temperature from the weather2 dataset. By flitering by the term Cabbage in Vegetable_Category, the dataframe cabbage was generated from veggiedata2. Similarly, by filtering by the term Temperature_DailyAverage in Condition in the weather2 dataframe, the dataframe temp was generated. Using ggplot() the barplot plotcabbage was created showing the distribution of cabbage types over time. This plot was then added to the line graph showing the daily average temperature in the plot cabbagetemp. The code for the cabbagetemp plot was a bit tricky given the secondary y-axis. Generally speaking, secondary axes can be very misleading, however in this case I feel that the graph clearly displays the weight and temperature on the right and left y-axis, respectively, and that it is clear to the reader which bars and curves belong to which axis.
Subsets of the cabbage dataframe based on the seasons were generated to find the sum of total amount of cabbage received in these time periods. Most cabbage was recieved in the winter (12.394kg) and the least in the autumn (2.986kg), with spring and summer falling in between (9.295kg and 5.146kg, respectively). Warmer temperatures correlate with less cabbage. As not the complete set of seasonal data from Autumn 2020 or Winter 2021 have been collected, these values are not representative for this comparison.
# Cabbage Types and Temperature
cabbage <- veggiedata2 %>%
filter (Vegetable_Category == "Cabbage")
cabbage$Vegetable <- gsub("Giant Kohlrabi", "Kohlrabi", cabbage$Vegetable)
cabbagecolours <- c("Broccoli" = "turquoise4", "Cauliflower" = "mediumpurple2", "Chinacabbage" = "darkseagreen2", "Red Cabbage" = "lightpink4", "White Cabbage" = "cornsilk2", "Green Cabbage" = "chartreuse2", "Brusselsprouts" = "seagreen4", "Kale" = "darkslategrey", "Sauerkraut" = "thistle3", "Kohlrabi" = "lightpink2")
xint <- c(as.Date(20/12, origin = "2020-12-01"),
as.Date(21/03, origin = "2021-03-01"),
as.Date(21/06, origin = "2021-06-01"),
as.Date(21/09, origin = "2021-09-01"),
as.Date(21/12, origin = "2021-12-01"))
plotcabbage <- ggplot(data=cabbage, aes(x=Date, y = Weight)) +
geom_bar(stat = "identity", aes(fill = Vegetable), color = "black") +
xlab("Date") +
ylab("Weight (gr)") +
ggtitle("The Distribution of Cabbage Types \n throughout the Seasons of the Year") +
scale_y_continuous(breaks = seq(0,4000, by = 250)) +
scale_x_date(date_breaks = "1 month", date_labels = "%m/%y") +
scale_fill_manual(name = "Cabbage Type",
values = cabbagecolours) +
theme(plot.title = element_text(face = "bold", hjust = 0.5),
legend.title = element_blank(),
axis.text.x = element_text(angle = 45, vjust = 0.5, hjust = 0.5),
axis.title.x = element_text(size = 10),
axis.text.y = element_text(hjust = 1.2),
axis.title.y = element_text(size = 10, vjust = 1),
# legend.position = c(0.83,0.79),
legend.key.size = unit(0.2, 'cm'),
legend.text = element_text(size = 6.5),
legend.background = element_blank(),
panel.background = element_rect(fill = "grey96")) +
geom_vline(xintercept = xint,
linetype = "dashed") +
geom_text(aes(x = as.Date(02/21, origin = "2021-01-15"), y = 3500, label = "Winter")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-04-15"), y = 3500, label = "Spring")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-07-15"), y = 3500, label = "Summer")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-10-15"), y = 3500, label = "Autumn"))
#plotcabbage
temp <- weather2 %>%
filter (weather2$Condition == "Temperature_DailyAverage")
ylim.veg <- c(0, 4000)
ylim.temp <- c(-5, 30)
b <- diff(ylim.veg)/diff(ylim.temp)
a <- ylim.veg[1] - b*ylim.temp[1]
cabbagetemp <- plotcabbage +
geom_line(data = temp, aes(y = a + (Measurement)*b, colour = ..y..),
linetype = "solid", alpha = 0.6, show.legend = F) +
geom_smooth(method = loess, data = temp, aes(y = a + (Measurement)*b, colour = ..y..),
linetype = "solid", alpha = 0.6, show.legend = F) +
scale_y_continuous("Weight (gr)",
sec.axis = sec_axis(~(.- a)/b,
name = "Average Daily Temperature (C)")) +
scale_colour_gradient(low = "purple", high = "orange")
cabbagetemp
# how many kilos of cabbage per season?
cabbage$Date <- as.Date(cabbage$Date, format= "%Y-%m-%d")
cabbage_autumn20 <- cabbage %>%
filter(Date < "2020-11-30") %>%
summarise(Season = "Autumn_2020",
Total_Weight_gr = sum(Weight))
cabbage_winter20 <- cabbage %>%
filter(Date > "2020-12-01" & Date < "2021-02-28") %>%
summarise(Season = "Winter_2020",
Total_Weight_gr = sum(Weight))
cabbage_spring21 <- cabbage %>%
filter(Date > "2021-03-01" & Date < "2021-05-31") %>%
summarise(Season = "Spring_2021",
Total_Weight_gr = sum(Weight))
cabbage_summer21 <- cabbage %>%
filter(Date > "2021-06-01" & Date < "2021-08-31") %>%
summarise(Season = "Summer_2021",
Total_Weight_gr = sum(Weight))
cabbage_autumn21 <- cabbage %>%
filter(Date > "2021-09-01" & Date < "2021-11-30") %>%
summarise(Season = "Autumn_2021",
Total_Weight_gr = sum(Weight))
cabbage_winter21 <- cabbage %>%
filter(Date > "2021-12-01" & Date < "2022-02-28") %>%
summarise(Season = "Winter_2021",
Total_Weight_gr = sum(Weight))
cabbage_seasontotal <- rbind(cabbage_autumn20, cabbage_winter20, cabbage_spring21, cabbage_summer21, cabbage_autumn21, cabbage_winter21)
print(cabbage_seasontotal)## Season Total_Weight_gr
## 1 Autumn_2020 2368
## 2 Winter_2020 12394
## 3 Spring_2021 9295
## 4 Summer_2021 5146
## 5 Autumn_2021 2986
## 6 Winter_2021 3388rm(cabbage_autumn20, cabbage_winter20, cabbage_spring21, cabbage_summer21, cabbage_autumn21, cabbage_winter21)A similar analysis was performed for root vegetables using the subset roots from the original dataframe veggiedata2. The most root vegetables are received in the winter and spring with 12.339kg and 13.983kg, autumn closely follows with 10.592kg whereas the summer months only see a total of 3.995kg. Also here, warmer temperatures appear to correlate with less root vegetables.
# Root Vegetable Types
roots <- veggiedata2 %>%
filter (Vegetable_Category == "Root Vegetable")
# To simplify the analysis, some vegetable names are combined
unique(roots$Vegetable)## [1] "Carrots (Multicolour)" "Carrots (Orange)" "Radishes"
## [4] "Salsify" "Beetroot" "Rettich"
## [7] "Parsnip" "Turnip"roots$Vegetable <- gsub("Rettich", "Radish", roots$Vegetable)
roots$Vegetable <- gsub("Radishes", "Radish", roots$Vegetable)
roots$Vegetable <- gsub("[()]", "", roots$Vegetable)
roots$Vegetable <- gsub("Carrots Multicolour", "Carrots", roots$Vegetable)
roots$Vegetable <- gsub("Carrots Orange", "Carrots", roots$Vegetable)
rootscolours <- c("Carrots" = "coral1", "Radish" = "maroon2", "Salsify" = "khaki3", "Beetroot" = "maroon4", "Parsnip" = "cornsilk2", "Turnip" = "cornsilk4")
plotroots <- ggplot(data=roots, aes(x=Date, y = Weight)) +
geom_bar(stat = "identity", aes(fill = Vegetable), colour = "black") +
xlab("Date") +
ylab("Weight (gr)") +
ggtitle("The Distribution of Root Vegetables Types \n throughout the Seasons of the Year") +
scale_y_continuous(breaks = seq(0,4000, by = 250)) +
scale_x_date(date_breaks = "1 month", date_labels = "%m/%y") +
scale_fill_manual(name = "Root Vegetable Type",
values = rootscolours) +
theme(plot.title = element_text(face = "bold", hjust = 0.5),
legend.title = element_blank(),
axis.text.x = element_text(angle = 45, vjust = 0.5, hjust = 0.5),
axis.title.x = element_text(size = 10),
axis.text.y = element_text(hjust = 1.2),
axis.title.y = element_text(size = 10, vjust = 1),
# legend.position = c(0.85,0.85),
legend.key.size = unit(0.25, 'cm'),
legend.background = element_blank(),
panel.background = element_rect(fill = "grey96")) +
geom_vline(xintercept = xint,
linetype = "dashed") +
geom_text(aes(x = as.Date(02/21, origin = "2021-01-15"), y = 3600, label = "Winter")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-04-15"), y = 3600, label = "Spring")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-07-15"), y = 3600, label = "Summer")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-10-15"), y = 3600, label = "Autumn"))
# plotroots
temp <- weather2 %>%
filter (weather2$Condition == "Temperature_DailyAverage")
ylim.roots <- c(0, 4000)
ylim.temp <- c(-5, 30)
d <- diff(ylim.roots)/diff(ylim.temp)
c <- ylim.roots[1] - d*ylim.temp[1]
rootstemp <- plotroots +
geom_line(data = temp, aes(y = c + (Measurement)*d, colour = ..y..),
linetype = "solid", alpha = 0.6, show.legend = F) +
geom_smooth(method = loess, data = temp, aes(y = c + (Measurement)*d, colour = ..y..),
linetype = "solid", alpha = 0.6, show.legend = F) +
scale_y_continuous("Weight (gr)",
sec.axis = sec_axis(~(.- c)/d,
name = "Average Daily Temperature (C)")) +
scale_colour_gradient(low = "purple", high = "orange") ## Scale for 'y' is already present. Adding another scale for 'y', which will
## replace the existing scale.rootstemp## `geom_smooth()` using formula 'y ~ x'
# how many kilos of root vegetables per season?
roots$Date <- as.Date(roots$Date, format= "%Y-%m-%d")
roots_autumn20 <- roots %>%
filter(Date < "2020-11-30") %>%
summarise(Season = "Autumn_2020",
Total_Weight_gr = sum(Weight))
roots_winter20 <- roots %>%
filter(Date > "2020-12-01" & Date < "2021-02-28") %>%
summarise(Season = "Winter_2020",
Total_Weight_gr = sum(Weight))
roots_spring21 <- roots %>%
filter(Date > "2021-03-01" & Date < "2021-05-31") %>%
summarise(Season = "Spring_2021",
Total_Weight_gr = sum(Weight))
roots_summer21 <- roots %>%
filter(Date > "2021-06-01" & Date < "2021-08-31") %>%
summarise(Season = "Summer_2021",
Total_Weight_gr = sum(Weight))
roots_autumn21 <- roots %>%
filter(Date > "2021-09-01" & Date < "2021-11-30") %>%
summarise(Season = "Autumn_2021",
Total_Weight_gr = sum(Weight))
roots_winter21 <- roots %>%
filter(Date > "2021-12-01" & Date < "2022-02-28") %>%
summarise(Season = "Winter_2021",
Total_Weight_gr = sum(Weight))
roots_seasontotal <- rbind(roots_autumn20, roots_winter20, roots_spring21, roots_summer21, roots_autumn21, roots_winter21)
print(roots_seasontotal)## Season Total_Weight_gr
## 1 Autumn_2020 5164
## 2 Winter_2020 12339
## 3 Spring_2021 13983
## 4 Summer_2021 3995
## 5 Autumn_2021 10592
## 6 Winter_2021 1747rm(roots_autumn20, roots_winter20, roots_spring21, roots_summer21, roots_autumn21, roots_winter21)In the following section I looked at the amounts of the two types of carrots in relation to all other vegetables present in each basket. The percentage of each basket's weight made up of carrots is relatively uniform throughout the year, ranging between 10.4% and 16.0% with the winter season of 2020 and the autumn season of 2021 having the least and most, respectively. Out of the 53 baskets recieved, 43 contained carrots and 10 did not.
# Amount of Carrots
carrotscolours <- c("Carrots (Orange)" = "orange", "Carrots (Multicolour)" = "mediumpurple2")
# Setting the order for the bar chart
vegorder <- unique(veggiedata2$Vegetable)
vegorder2 <- vegorder[!vegorder %in% c("Carrots (Orange)", "Carrots (Multicolour)")]
vegorder3 <- c(vegorder2, "Carrots (Multicolour)", "Carrots (Orange)")
veggiedata3 <- veggiedata2 %>%
arrange(Date, factor(Vegetable, levels = vegorder3))
veggiedata3$Vegetable <- factor(veggiedata3$Vegetable, levels = vegorder3)
veggiedata3$Percent <- paste(veggiedata3$Percent, "%", sep="")
# Plotting
plotcarrots <- ggplot(veggiedata3, aes(x=Date, y = Weight, fill = Vegetable)) +
geom_bar(stat = "identity") +
xlab("Date") +
ylab("Weight (gr)") +
ggtitle("Percentage of Carrots in each \n Vegetable Basket throughout the Seasons of the Year") +
scale_y_continuous(breaks = seq(0,8000, by = 500)) +
scale_x_date(date_breaks = "1 month", date_labels = "%m/%y") +
scale_fill_manual(values = carrotscolours) +
theme(plot.title = element_text(face = "bold", hjust = 0.5),
legend.position = "bottom",
legend.key.size = unit(0.5, 'cm'),
legend.title = element_blank(),
axis.text.x = element_text(angle = 45, vjust = 0.5, hjust = 0.5),
axis.title.x = element_text(size = 10),
axis.text.y = element_text(hjust = 1.2),
axis.title.y = element_text(size = 10, vjust = 1),
panel.background = element_rect(fill = "grey96")) +
geom_vline(xintercept = xint, linetype = "dashed") +
geom_text(aes(x = as.Date(02/21, origin = "2021-01-15"), y = 7500, label = "Winter")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-04-15"), y = 7500, label = "Spring")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-07-15"), y = 7500, label = "Summer")) +
geom_text(aes(x = as.Date(02/21, origin = "2021-10-15"), y = 7500, label = "Autumn")) +
geom_text(aes(label=ifelse(Vegetable == "Carrots (Orange)" | Vegetable == "Carrots (Multicolour)",
Percent, "")),
size = 1.5,
angle = 90,
position = position_stack(vjust = 0.5))
plotcarrots
# average amount of carrots per season
carrots <- veggiedata2 %>%
filter(Vegetable == "Carrots (Orange)" | Vegetable == "Carrots (Multicolour)")
carrots$Date <- as.Date(carrots$Date, format= "%Y-%m-%d")
carrots_autumn20 <- carrots %>%
filter(Date < "2020-11-30") %>%
summarise(Season = "Autumn_2020",
Average_Percent = mean(Percent))
carrots_winter20 <- carrots %>%
filter(Date > "2020-12-01" & Date < "2021-02-28") %>%
summarise(Season = "Winter_2020",
Average_Percent = mean(Percent))
carrots_spring21 <- carrots %>%
filter(Date > "2021-03-01" & Date < "2021-05-31") %>%
summarise(Season = "Spring_2021",
Average_Percent = mean(Percent))
carrots_summer21 <- carrots %>%
filter(Date > "2021-06-01" & Date < "2021-08-31") %>%
summarise(Season = "Summer_2021",
Average_Percent = mean(Percent))
carrots_autumn21 <- carrots %>%
filter(Date > "2021-09-01" & Date < "2021-11-30") %>%
summarise(Season = "Autumn_2021",
Average_Percent = mean(Percent))
carrots_winter21 <- carrots %>%
filter(Date > "2021-12-01" & Date < "2022-02-28") %>%
summarise(Season = "Winter_2021",
Average_Percent = mean(Percent))
carrots_seasontotal <- rbind(carrots_autumn20, carrots_winter20, carrots_spring21, carrots_summer21, carrots_autumn21, carrots_winter21)
print(carrots_seasontotal)## Season Average_Percent
## 1 Autumn_2020 13.22500
## 2 Winter_2020 10.38333
## 3 Spring_2021 15.18571
## 4 Summer_2021 11.10000
## 5 Autumn_2021 16.02500
## 6 Winter_2021 11.30000rm(carrots_autumn20, carrots_winter20, carrots_spring21, carrots_summer21, carrots_autumn21, carrots_winter21)
# how many times were carrots recieved?
basket_number <- sum(!duplicated(veggiedata2$Date))
yes_carrots <- sum(!duplicated(carrots$Date))
no_carrots <- basket_number - yes_carrots